Well I have tried all kinds of cat litter. We use the scoopable kind, Tidy cat for Multiple Cats with long lasting odor control. To me the clumps stick VERY well and I LOVE it! I tried Fresh Step and I hated it. But what I find works best is the CHEEPEST you can buy. Albertson's has great scoopable cat litter, and to me it works better than all the others I have tried.